Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  Structural studies of WC(0001) and the adsorption of benzene

Brillo, J., Hammoudeh, A., Kuhlenbeck, H., Panagiotides, N., Schwegmann, S., Over, H., et al. (1998). Structural studies of WC(0001) and the adsorption of benzene. Journal of Electron Spectroscopy and Related Phenomena, 96(1-3), 53-60. doi:10.1016/S0368-2048(98)00222-9.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Brillo, Jürgen1, Autor           
Hammoudeh, Ayman2, Autor
Kuhlenbeck, Helmut1, Autor           
Panagiotides, N.3, Autor
Schwegmann, Stefan4, Autor           
Over, Herbert4, Autor           
Freund, Hans-Joachim1, Autor           
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Yarmouk University, Faculty of Sciences, Department of Chemistry, Irbid, Jordan, ou_persistent22              
3Fritz Haber Institute, Max Planck Society, Faradayweg 4-6, 14195 Berlin, DE, ou_24021              
4Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: We report on studies dealing with the structure of WC(0001) and the adsorption of benzene on this surface. An I(V)-low-energy electron diffraction structure analysis has been performed to elucidate the surface structure of WC(0001). These studies indicate that the surface consists of a tungsten layer covered by carbon randomly distributed on the hcp sites with a coverage of 30% that of a full carbon layer. The distance between this carbon layer and the tungsten layer beneath is enlarged by 5% with respect to the spacing between carbon and tungsten layers in the bulk. Only a small deviation from the bulk value was found for the distance between the first tungsten layer and the carbon layer below. No indications of surface reconstruction have been observed. Benzene adsorption was studied on clear oxygen covered and oxidized WC(0001). The benzene multilayer desorbs at T≤200 K. On stoichiometric WC(00001), molecular benzene of (sub)monolayer coverage is found up to temperatures of T≈230 K. After desorption of this species, small signals of fragments are visible in the photoelectron spectra up to T≈1000 K. Above this temperature, a graphite covered surface remains. On a surface covered by a thin closed oxide phase (WO) only multilayer adsorption is found; above T≈200 K no adsorption takes place under UHV conditions. Weakly oxidized WC(0001) interacts more strongly with benzene in that strong photoemission signals of a (sub)monolayer species are visible up to a temperature of T≈340 K.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 1998-05-111998-06-121998-11
 Publikationsstatus: Erschienen
 Seiten: 8
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/S0368-2048(98)00222-9
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Journal of Electron Spectroscopy and Related Phenomena
  Kurztitel : J. Electron Spectrosc. Relat. Phenom.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Amsterdam : Elsevier B.V.
Seiten: 8 Band / Heft: 96 (1-3) Artikelnummer: - Start- / Endseite: 53 - 60 Identifikator: ISSN: 0368-2048
CoNE: https://pure.mpg.de/cone/journals/resource/954925524767